Struct cursive::reexports::ahash::random_state::RandomState
source · [−]pub struct RandomState { /* private fields */ }
Expand description
Implementations
sourceimpl RandomState
impl RandomState
sourcepub fn new() -> RandomState
pub fn new() -> RandomState
Use randomly generated keys
sourcepub fn generate_with(k0: u64, k1: u64, k2: u64, k3: u64) -> RandomState
pub fn generate_with(k0: u64, k1: u64, k2: u64, k3: u64) -> RandomState
Allows for supplying seeds, but each time it is called the resulting state will be different. This is done using a static counter, so it can safely be used with a fixed keys.
sourcepub fn with_seed(key: usize) -> RandomState
pub fn with_seed(key: usize) -> RandomState
Allows for explicitly setting a seed to used.
Note: This method does not require the provided seed to be strong.
sourcepub const fn with_seeds(k0: u64, k1: u64, k2: u64, k3: u64) -> RandomState
pub const fn with_seeds(k0: u64, k1: u64, k2: u64, k3: u64) -> RandomState
Allows for explicitly setting the seeds to used.
Note: This method is robust against 0s being passed for one or more of the parameters or the same value being passed for more than one parameter.
sourcepub fn hash_one<T>(&self, x: T) -> u64where
T: Hash,
RandomState: Sized,
pub fn hash_one<T>(&self, x: T) -> u64where
T: Hash,
RandomState: Sized,
Calculates the hash of a single value.
This is intended as a convenience for code which consumes hashes, such
as the implementation of a hash table or in unit tests that check
whether a custom Hash
implementation behaves as expected.
This must not be used in any code which creates hashes, such as in an
implementation of Hash
. The way to create a combined hash of
multiple values is to call Hash::hash
multiple times using the same
Hasher
, not to call this method repeatedly and combine the results.
Trait Implementations
sourceimpl BuildHasher for RandomState
impl BuildHasher for RandomState
sourcefn build_hasher(&self) -> AHasher
fn build_hasher(&self) -> AHasher
Constructs a new AHasher with keys based on this RandomState object. This means that two different RandomStates will will generate AHashers that will return different hashcodes, but Hashers created from the same BuildHasher will generate the same hashes for the same input data.
Examples
use ahash::{AHasher, RandomState};
use std::hash::{Hasher, BuildHasher};
let build_hasher = RandomState::new();
let mut hasher_1 = build_hasher.build_hasher();
let mut hasher_2 = build_hasher.build_hasher();
hasher_1.write_u32(1234);
hasher_2.write_u32(1234);
assert_eq!(hasher_1.finish(), hasher_2.finish());
let other_build_hasher = RandomState::new();
let mut different_hasher = other_build_hasher.build_hasher();
different_hasher.write_u32(1234);
assert_ne!(different_hasher.finish(), hasher_1.finish());
sourcefn hash_one<T>(&self, x: T) -> u64where
T: Hash,
🔬This is a nightly-only experimental API. (build_hasher_simple_hash_one
)
fn hash_one<T>(&self, x: T) -> u64where
T: Hash,
build_hasher_simple_hash_one
)Calculates the hash of a single value.
This is intended as a convenience for code which consumes hashes, such
as the implementation of a hash table or in unit tests that check
whether a custom Hash
implementation behaves as expected.
This must not be used in any code which creates hashes, such as in an
implementation of Hash
. The way to create a combined hash of
multiple values is to call Hash::hash
multiple times using the same
Hasher
, not to call this method repeatedly and combine the results.
sourceimpl Clone for RandomState
impl Clone for RandomState
sourcefn clone(&self) -> RandomState
fn clone(&self) -> RandomState
Returns a copy of the value. Read more
1.0.0 · sourcefn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
sourceimpl Debug for RandomState
impl Debug for RandomState
sourceimpl Default for RandomState
impl Default for RandomState
sourcefn default() -> RandomState
fn default() -> RandomState
Returns the “default value” for a type. Read more
Auto Trait Implementations
impl RefUnwindSafe for RandomState
impl Send for RandomState
impl Sync for RandomState
impl Unpin for RandomState
impl UnwindSafe for RandomState
Blanket Implementations
sourceimpl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more